Fold mountains form along plate boundaries where two plates collide and push sedimentary rock layers upwards into folds. The movement of plates compresses and bends the layers at different rates, creating anticlines and synclines. Ocean trenches form at destructive plate boundaries where an oceanic plate subducts under a continental or oceanic plate, creating the deepest parts of the ocean. Composite volcanoes are steep-sided and symmetrical with layers of lava and ash, while shield volcanoes have gentle slopes and wide bases due to more fluid basic lava.

1. Unique landforms locate at plate margins Objectives: To understand and be able to explain the location and formation of fold mountains ocean trenches, composite volcanoes Shield volcanoes.

2. Fold mountains What are fold mountains? Fold mountains are found in many parts of the world. They form along the plate boundaries where great movements have taken place and mountains formed from the folding of the earth's crust.

3. Describe the formation of fold mountains http://uk.youtube.com/watch?v=ngV66m00UvU&feature=related http://uk.youtube.com/watch?v=jVyBsUgD7Gk&NR=1

6. Anticline

7. Syncline

10. map

11. Ocean trenches http://visual.merriam-webster.com/images/earth/geology/ocean-trenches-ridges.jpg

13. Which is the deepest ocean trench? Mariana Trench has a maximum depth of about 11 km (6.8 miles)

14. At destructive plate boundaries the lava is viscous (thick like treacle) and it cannot flow very far from the volcano’s vent. This makes the volcano steep sided. At constructive plate boundaries the lava is runny and it can flow far away from the volcano’s vent. This makes the volcano gentle sided.

16. Examples: Mauna Loa, Kilauea - both Hawaiian islands Characteristics: Basic lava Gentle slopes Wide base Lava flows more easily, travels longer distances before cooling Usually non-violent